It really does happen when you're not looking for it.
I'm the nerd who married the guy she dated in high school. Though i don't have a ton of dating experience, the one thing I learned was to stop really "looking" for it. You can't force it sometimes, you know? It's just meant to be. When i was younger, I remember feeling so desperate to be dating someone and I was completely unhappy. One day I decided to chill out and let things happen as they happen, and i met and fell in love with the man who is now my husband. We've been together for nearly 11 years, married for nearly one, and we're just as happy as when we met.
So that's my wisdom! Don't force it, and the powers that be/karma/god/theuniverse, or whatever you believe in, will bring you the right person.